S. M. Tracy Herbarium

st “big thicket” collections made by Geraldine Watson (1927-2012). Of the 188 extant herbaria in the southern United States, the S. Tracy Herbarium ranks 10th in size, and is the 3rd largest herbarium in Texas. The collection currently houses nearly 300,000 specimens and adds approximately 2500 - 3000 new accessions per year. The type collection at TAES consists of 199 specimens, of which, 130 are Poaceae, 19 Asteraceae, 17 Cyperaceae, and includes 15 holotypes. Originally in the Department of Range and Forestry, now Ecosystem Science and Management, TAES has traditionally placed a strong emphasis on grass systematics and ecology. As a result, a substantial portion of the specimens are in the Poaceae family. This represents the largest collection of grasses in Texas, and one of the largest regionally. Due in large part to these grass holdings, TAES was designated a National Resource Collection in 1979. Other vascular plant families with significant representations are the Asteraceae (ca. 20,000), Cyperaceae (ca. 11,000), Fabaceae (ca. 7000), Euphorbiaceae (ca. 3000), Rosaceae (ca. 3000), and Juncaceae (ca. 1000). Increasing the taxonomic breadth of the collection, in recent years TAES has added a substantial number of bryophyte collections (ca. 6,000) to its holdings. In addition, TAES also houses the largest collections of fungi (ca. 1750) and algae (ca. 900) of any herbarium in Texas. New acquisitions are obtained through the annual collection efforts of herbarium faculty, staff and students associated with research and educational pursuits, and also through an on-going exchange program with nearly 35 worldwide herbaria. Specimens in the collection cover a wide range of temporal, geographic, and taxonomic distributions. The oldest collections date as far back as 1820, with a good representation of specimens from the mid to late 1800’s. The geographic distribution of the collection encompasses every continent, including Antarctica, although the majority of accessions are from the United States, Canada, Mexico, Central and South America. The primary geographic emphasis of the collection is Texas, the southern United States and northern Mexico. TAES is also the designated voucher repository for several National Park Service units: Big Thicket National Preserve, Padre Island National Seashore, Palo Alto Battlefield National Historic Site, Natchez Trace National Parkway. In recent years, these active agreements have resulted in nearly 13,000 accessions alone. Various other state and federal agencies also utilize TAES as a repository for vouchers resulting from their research activities (Texas Parks and Wildlife Department, U.S.